TPU (thermoplastic polyurethanes), a thermoplastic TPU elastomer, is made of MDI containing NCO functional groups and POLYOL and 1.4BG containing OH functional groups through extrusion and mixing. Because of its good elasticity, good physical properties and good mechanical strength, it is widely used in processing methods such as injection, extrusion, calendering and dissolution into solution resin, and is a plastic material often used by plastic processors. In recent years, due to the continuous development of new products, the consumption of thermoplastic PU elastomer is constantly increasing, creating a new opportunity for plastic processors with low cost and high added value. TPU (Thermoplastic Polyurethane) is increasingly popular because of its superior performance and environmental protection concept. At present, TPU can be a substitute for PVC wherever it is used. But the advantages of TPU, PVC is far behind. TPU not only has excellent characteristics of high tension, high tension, toughness and aging resistance, but also is a mature environmental protection material. At present, TPU has been widely used in: shoes, garments, inflatable toys, aquatic and underwater sports equipment, medical equipment, fitness equipment, car seat materials, umbrellas, suitcases, purses, etc. The TPU film is made from TPU granules by calendering, casting, film blowing, coating and other processes. At present, it is widely used in sports shoes: trademark decoration on soles and uppers, airbags, air cushions, oil bags and so on. At present, there are two trends in the application of TPU film in sports shoes: one is the popular trend caused by women's sandals, that is, the high-transparency TPU film is directly cut, printed and colored by screen printing, or attached to the cloth base to form a sandwich net cloth, etc., and it is formed and adhered to the upper with high frequency, which has functional and decorative effects. Secondly, the waterproof and moisture-permeable TPU film is used in conjunction with the cloth for shoe materials to achieve the waterproof and moisture-permeable effect.